Setting the plates — loading 13,000 ZIP-code positions…
2026
cumulative
Twenty-one years of helping monarch butterflies
Registrations per year, with the running total drawn over them. 2026 is a partial year — the registry runs through early July.
Where the milkweed grows
The fifteen U.S. states with the most registered habitats.
Worldwide
Every country and territory in the registry.
Habitat patch size
Distribution of registered habitats by area class — in landscape ecology, even the smallest patches serve as stepping-stones along the flyway.